灾害学2024，Vol.39Issue(4)：115-124,10.DOI:10.3969/j.issn.1000-811X.2024.04.017
台风"暹芭"不同阶段的大暴雨雨滴谱特征分析
Analysis of Raindrop Spectrum Characteristics for Stages of Heavy Rainstorm Events Caused by Typhoon Chaba in Hunan
摘要
Abstract
Based on the raindrop spectrum data of the National Meteorological Obervation Station,combined with the reanalysis data of rain gauge,radar and ERAS,representative inverted through and low pressure stages of Jiangyang station and Ningxiang station are selected to analyze the raindrop spectrum characteristics of heavy nainstorm in different stages affected by the 2022 Typhoon"Chaba"in Hunan.Results show that:①The frequen-cy of stratiform precipitation is much higher than that of convective precipitation,the precipitation at Jiangyong sta-tion is stable and continuous,while the precipitation at Ninxiang station fluctuates significantly with time;The maximum number concentration appears at the diameter of 0～1 mm,which is obviously higher than the statistical value of small raindrop concentration in common convective precipitation in East Asia.②The number concentration and rainfall are dominated by raindrops with the diameter of 0～1 mm and 1～3 mm respectively,particles with di-ameter greater than 1 mm are the most important part of rainfall in convective precipitation at Ninxiang station.③The width of average scale spectra at Jiangyong station was inversely proportional to rainfall intensity;The number concentration of larger raindrops was not decrease with the increased droplet diameter,and the number concentra-tion of smaller raindrops and scale spectra width increase with rainfall intensity.④The average value of log10Nw and Dm in convective precipitation of Jiangyong station towards oceanic convection,while the consequential value of Ninxiang station was between continental and oceanic ones.⑤The μ-λ relationship in Jiangyong station is λ=0.02μ2+0.48μ+3.58 while in Ninxiang station is λ=-0.01μ2+0.9μ+1.59;Rainfall intensity inverted by Z-R re-lationships according to precipitation type is closer to real rainfall intensity,which could improve the estimation ac-curacy of heavy rain.关键词
台风"暹芭"/大暴雨/不同阶段/雨滴谱/Gamma分布/微物理特征Key words
Typhoon"Chaba"/heavy rainstorm/different stages/raindrop size distribution/Gamma dis-tribution/microphysical characteristics分类
资源环境引用本文复制引用
吴亚昊,唐明晖,游枭雄,陈紫妍,杨湘婧,赵浩阳..台风"暹芭"不同阶段的大暴雨雨滴谱特征分析[J].灾害学,2024,39(4):115-124,10.基金项目
湖南省自然科学基金重大项目"中小尺度强对流天气系统及其衍生灾害多源卫星遥感模型研究"(2021JC009)、风云卫星应用先行计划(2022)"基于风云卫星的人工智能对流初生预警技术"(FY-APP-20220605) （2021JC009）
